Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Geology (30004)
- Life Sciences (14813)
- Soil Science (14409)
- Plant Sciences (11786)
- Agronomy and Crop Sciences (10417)
-
- Weed Science (9711)
- Agricultural Science (9568)
- Plant Biology (9394)
- Plant Pathology (9308)
- Environmental Sciences (9280)
- Hydrology (5276)
- Engineering (3885)
- Oceanography and Atmospheric Sciences and Meteorology (3333)
- Sustainability (2634)
- Water Resource Management (2543)
- Geophysics and Seismology (2468)
- Geomorphology (2258)
- Oil, Gas, and Energy (2082)
- Mining Engineering (1943)
- Sedimentology (1934)
- Environmental Monitoring (1783)
- Natural Resources Management and Policy (1667)
- Other Earth Sciences (1656)
- Social and Behavioral Sciences (1640)
- Paleontology (1631)
- Stratigraphy (1560)
- Geochemistry (1548)
- Other Environmental Sciences (1365)
- Institution
-
- Western Michigan University (19480)
- University of Kentucky (10980)
- University of Nebraska - Lincoln (4538)
- University of South Florida (1880)
- China Coal Technology and Engineering Group (CCTEG) (1822)
-
- Department of Primary Industries and Regional Development, Western Australia (1674)
- Utah State University (1565)
- TÜBİTAK (917)
- Missouri University of Science and Technology (782)
- University of Arkansas, Fayetteville (764)
- Portland State University (671)
- Boise State University (667)
- Old Dominion University (663)
- University of Nevada, Las Vegas (521)
- University of Texas Rio Grande Valley (520)
- Montana Tech Library (496)
- Western Kentucky University (496)
- University of Colorado Law School (481)
- University of North Dakota (448)
- Louisiana State University (424)
- University of New Mexico (402)
- Montclair State University (386)
- Central Washington University (368)
- City University of New York (CUNY) (315)
- University of Texas at El Paso (315)
- University of South Carolina (280)
- Michigan Technological University (254)
- Brigham Young University (240)
- University of Texas at Arlington (237)
- University of New Hampshire (230)
- Keyword
-
- Western Australia (1183)
- Geology (902)
- Grains and field crops (625)
- Groundwater (621)
- Nebraska (589)
-
- Climate change (464)
- Grazing (407)
- Geochemistry (403)
- Soil (372)
- Hydrology (358)
- Montana (326)
- Nitrogen (323)
- Kentucky (302)
- Remote sensing (283)
- Salinity (282)
- Water quality (281)
- Drought (277)
- Utah (272)
- Water (240)
- Karst (233)
- Geophysics (228)
- Alfalfa (223)
- Climate (219)
- Hydrogeology (215)
- Phosphorus (213)
- Geomorphology (205)
- Agriculture (204)
- Stratigraphy (204)
- Irrigation (202)
- United States (191)
- Publication Year
- Publication
-
- Legacy Scout Tickets from Pure Oil Company (11044)
- IGC Proceedings (1977-2023) (9261)
- Thin Sections (6677)
- Coal Geology & Exploration (1822)
- Legacy Color Lithology Strip Logs (1152)
-
- United States Geological Survey: Staff Publications (1026)
- Turkish Journal of Earth Sciences (917)
- Conservation and Survey Division: Faculty and Staff Publications (901)
- International Journal of Speleology (889)
- Theses and Dissertations (835)
- Department of Earth and Atmospheric Sciences: Faculty Publications (670)
- Experimental Summaries - Plant Research (668)
- Masters Theses (591)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (454)
- School of Earth, Environmental, & Marine Sciences Faculty Publications (429)
- Bachelors Theses and Reports, 1928 - 1970 (423)
- Geosciences Faculty Publications and Presentations (394)
- Faculty Publications (383)
- Kentucky Alfalfa and Stored Forage Conference (382)
- School of Geosciences Faculty and Staff Publications (355)
- Dissertations and Theses (343)
- Earth and Planetary Sciences ETDs (343)
- Graduate Theses and Dissertations (339)
- Electronic Theses and Dissertations (325)
- Memorandum (316)
- Resource management technical reports (315)
- Open Access Theses & Dissertations (294)
- Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works (280)
- USF Tampa Graduate Theses and Dissertations (272)
- Department of Earth and Environmental Studies Faculty Scholarship and Creative Works (265)
- Publication Type
Articles 59401 - 59430 of 59530
Full-Text Articles in Earth Sciences
An Account Of The Nebraska Geological Survey, Erwin Hinckley Barbour
An Account Of The Nebraska Geological Survey, Erwin Hinckley Barbour
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
An Important Undeveloped Clay Bed, Erwin Hinckley Barbour
An Important Undeveloped Clay Bed, Erwin Hinckley Barbour
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Bulletin No. 114 - The Movement Of Nitric Nitrogen In Soil And Its Relation To "Nitrogen Fixation", Robert Stewart, J. E. Greaves
Bulletin No. 114 - The Movement Of Nitric Nitrogen In Soil And Its Relation To "Nitrogen Fixation", Robert Stewart, J. E. Greaves
UAES Bulletins
In the spring of 1903, we commenced at the Utah Experiment Station a series of experiments, the purpose of which was to study the development and movement of nitrates in irrigated soil. The work was so outlined that it should give some very definite results, both as to the influence of water and the plant, upon the nitric nitrogen content of the soil.
Notes On The Eleventh International Geological Congress Held In Stockholm, August 18-25, 1910, Horace V. Winchell
Notes On The Eleventh International Geological Congress Held In Stockholm, August 18-25, 1910, Horace V. Winchell
Journal of the Minnesota Academy of Science
No abstract provided.
Report Of The Second Annual Nebraska Conservation And State Development Congress, G. E. Condra, W. G. Whitmore, W. R. Mellor
Report Of The Second Annual Nebraska Conservation And State Development Congress, G. E. Condra, W. G. Whitmore, W. R. Mellor
George E. Condra Publications
No abstract provided.
Ua94/6/2/7 Physiography Notebook, Carl Ellis
Ua94/6/2/7 Physiography Notebook, Carl Ellis
Student/Alumni Personal Papers
Atlas Science Table for Laboratory Notes and Drawings in Physiography notebook used by Carl Ellis for Robert Green's class.
The Iron Ore Ranges Of Minnesota, And Their Differences, N. H. Winchell
The Iron Ore Ranges Of Minnesota, And Their Differences, N. H. Winchell
Journal of the Minnesota Academy of Science
No abstract provided.
A New Carboniferous Coral "Craterophyllum Verticillatum", Erwin Kinckley Barbour
A New Carboniferous Coral "Craterophyllum Verticillatum", Erwin Kinckley Barbour
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Bulletin No. 109 - The Nitrogen And Humus Problem In Dry-Land Farming, Robert Stewart
Bulletin No. 109 - The Nitrogen And Humus Problem In Dry-Land Farming, Robert Stewart
UAES Bulletins
The effect of cultivation and the growth of crops upon the nitrogen and humus content of soils has been studied by various investigators, both in America and Europe. In general, the results of the various investigations indicate that cropping and cultivation are very destructive of the organic. matter and the nitrogen of the surface soil.
Extinct Pleistocene Mammals Of Minnesota, N. H. Winchell
Extinct Pleistocene Mammals Of Minnesota, N. H. Winchell
Journal of the Minnesota Academy of Science
No abstract provided.
Englacial And Superglacial Drift In Minnesota, The Dakotas, And Manitoba, Warren Upham
Englacial And Superglacial Drift In Minnesota, The Dakotas, And Manitoba, Warren Upham
Journal of the Minnesota Academy of Science
No abstract provided.
Ua94/6/2/14 Physiography Notebook, Annie Reis
Ua94/6/2/14 Physiography Notebook, Annie Reis
Student/Alumni Personal Papers
Physiography notebook kept by student Annie Reis in 1910. Notebook includes notes and drawings related to physical geography such as solar systems, rivers, faults, weather and glaciers.
Some Ore Deposits In Maine And The Milan Mine, New Hampshire, William H. Emmons
Some Ore Deposits In Maine And The Milan Mine, New Hampshire, William H. Emmons
Maine Collection
Some Ore Deposits in Maine and The Milan Mine, New Hampshire
by William H. Emmons
Department of the Interior, United States Geological Survey - Bulletin 432
Washington, D.C. (1910).
Contents: Introduction / Geology / Ore Deposits / Descriptions of Mines / Mines of Hancock County / Mines of Washington County / Mines in Somerset and Oxford Counties / Milan Mine, New Hampshire / Index
Geographical Influences In The Development Of Nebraska, George E. Condra
Geographical Influences In The Development Of Nebraska, George E. Condra
George E. Condra Publications
Nebraska is centrally located in the mainland of the United States, being a part of the long slope of the High Plains regions.
Coal In Nebraska, Roy V. Pepperberg
Coal In Nebraska, Roy V. Pepperberg
Conservation and Survey Division: Faculty and Staff Publications
Until February, 1906, Nebraska was termed "the state without a mine," and may still be called the state with but a single mine, and yet it would be impossible to tell how much prospecting has been done, or to estimate the number of thousands of dollars that have been spent in this state trying to develop paying mines from the thin beds of coal discovered throughout various parts of the state in the Carboniferous and Cretadeous formations.
Hennepin At The Falls Of St. Anthony, N. H. Winchell
Hennepin At The Falls Of St. Anthony, N. H. Winchell
Journal of the Minnesota Academy of Science
No abstract provided.
The Development Of Our Natural Resources, E. H. Barbour
The Development Of Our Natural Resources, E. H. Barbour
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Preliminary Notes On The Carboniferous Flora Of Nebraska, Roy V. Pepperberg
Preliminary Notes On The Carboniferous Flora Of Nebraska, Roy V. Pepperberg
Conservation and Survey Division: Faculty and Staff Publications
About the middle of July, 1907, while engaged by the Nebraska City Commercial Club in examining the geology of Nebraska City and vicinity, the writer was called b the farm of Mr. C. B. James to look at a bed of what was supposed to be fire clay. This proved to be a Carboniferous deposit of stratified micaceous sandstone, interstratified with a fine compact shale, both of which are yellow in color and very fragile when wet.
Coal In Nebraska, Roy V. Pepperberg
Coal In Nebraska, Roy V. Pepperberg
Conservation and Survey Division: Faculty and Staff Publications
Until February, 1906, Nebraska was termed "the state without a mine," and may still be called the state with but a single mine, and yet it would be impossible to tell how much prospecting has been done, or to estimate the number of thousands of dollars that have been spent in this state trying to develop paying mines from the thin beds of coal discovered throughout various parts of the state in the Carboniferous and Cretaceous formations.
Bulletin No. 106 - A Study Of The Production And Movement Of Nitric Nitrogen In An Irrigated Soil, Robert Stewart, J. E. Greaves
Bulletin No. 106 - A Study Of The Production And Movement Of Nitric Nitrogen In An Irrigated Soil, Robert Stewart, J. E. Greaves
UAES Bulletins
The problem of maintaining the nitrogen content in our agricultural soils is one of vital importance to the development of a permanent system of agriculture. Any investigation, therefore, which tends to throw any light on the conditions which are necessary for maintaining the maximum supply of nitrogen in our soils needs no apology for its institution.
Report On A Portion Of The Soda Springs Mining District In Bernalillo County, New Mexico, Edmund Ross
Report On A Portion Of The Soda Springs Mining District In Bernalillo County, New Mexico, Edmund Ross
Earth and Planetary Sciences ETDs
No abstract provided.
Paleogeographic Maps Of North America, Bailey Willis
Paleogeographic Maps Of North America, Bailey Willis
United States Geological Survey: Staff Publications
In passing from the Jurassic to the Lower Cretaceous North America underwent but little change along the Atlantic border and throughout the east. It remained a low land and the coastal plain was somewhat more deeply submerged. But on the Pacific coast, on the contrary, there was pronounced movement, particularly in the Coast Range of California. A bold peninsula developed from Oregon south to Santa Barbara and, being eroded, yielded the thick sediments of the Shasta group, which were deposited in marine water east of it, in part.
In Alaska the Shastan sea appears to have invaded the Jurassic land …
Bulletin No. 104 - The Storage Of Winter Precipitation In Soils, John A. Widtsoe
Bulletin No. 104 - The Storage Of Winter Precipitation In Soils, John A. Widtsoe
UAES Bulletins
It has been found that the production of one pound of dry plant substance on soils of average fertility, requires in humid districts not more than five hundred pounds of water, and in arid districts like Utah about seven hundred and fifty pounds. This indicates that the average rainfall of Utah, which is about twelve inches, if properly conserved in the soil, is sufficient to produce annually, without irrigation, from thirty to forty-five bushels of wheat to the acre, or corresponding yields of other crops. The realization of this truth has changed greatly our views of irrigation practices. The beginning …
The Sand And Gravel Resources And Industries Of Nebraska, George Evart Condra
The Sand And Gravel Resources And Industries Of Nebraska, George Evart Condra
George E. Condra Publications
Sand and gravel are Nebraska's most important mineral resources. The extensive use which is made of these materials in the building and trade industries not only in our own but in adjoining states, is a factor of economic importance in the industrial development of Nebraska.
Skeletal Parts Of Moropus, Erwin Hinckley Barbour
Skeletal Parts Of Moropus, Erwin Hinckley Barbour
Conservation and Survey Division: Faculty and Staff Publications
In the foregoing publication, it was announced that the skull of Moropus had been discovered. Heretofore the genus had been known chiefly by scattered teeth and fragments, mostly toe bones, but now that the collections of Hon. Charles H. Morrill, Nebraska State Museum, have the skeletal parts necessary for the restoration of this remarkable animal, it seems advisable to supplement the brief illustrated report concerning the skull of Moropus with a similar paper concerning its skeletal parts.
The Control, Development And Utilization Of The Missouri River And Its Tributaries, G. E. Condra, H. W. Caldwell, O. V.P. Stout, F. J. Phillips, N. A. Bengtson, George L. Sheldon
The Control, Development And Utilization Of The Missouri River And Its Tributaries, G. E. Condra, H. W. Caldwell, O. V.P. Stout, F. J. Phillips, N. A. Bengtson, George L. Sheldon
Conservation and Survey Division: Faculty and Staff Publications
The speakers at this conference were Professors Condra, Caldwell, Stout, Phillips, Bengtson, and Gov. George L. Sheldon, with Dean Charles E. Bessey presiding. The principal object of the meeting was to make known reliable information in regard to the Missouri river, concerning which there is widespread interest and in some instances a tendency to magnify the future possibilities of the river. This paper is an account of the conference. It gives some of the thoughts that were emphasized at the symposium, reciting the facts as they were given by those who have investigated the respective phases of the theme.
GEOGRAPHIC …
The Skull Of Moropus, Erwin Hinckley Barbour
The Skull Of Moropus, Erwin Hinckley Barbour
Conservation and Survey Division: Faculty and Staff Publications
During the summer of 1905 the Morrill Geological Expedition of the University of Nebraska had the good fortune to discover early in July the skull of Moropus. Associated with it were mandible, atlas and other cervicals, and various skeletal parts.
Tests Of The Strength Of Concrete
Tests Of The Strength Of Concrete
Conservation and Survey Division: Faculty and Staff Publications
Since the use of concrete is becoming so general it seems quite appropriate that the tests of concrete in which any Nebraska material forms a constituent part should be recorded where they may be obtained by those interested.. The following tests were made in the Testing Laboratory of the University of Nebraska, and though very limited in number may be expressive of the qualities of concrete mixed from these materials.
On The Origin And Definition Of The Geologic Term "Laramie", A. C. Veatch
On The Origin And Definition Of The Geologic Term "Laramie", A. C. Veatch
United States Geological Survey: Staff Publications
INTRODUCTION
Investigations of the United States Geological Survey during the summer of I906, covering the larger part of the Laramie exposures on the Laramie Plains, examined by the King and Hayden surveys, have revealed many new and important facts bearing on the Laramie problem.
By detailed areal surveys it was found: (1) that the lignitiferous series, which in the Laramie Plains lies between the Montana below and the Fort Union above, and has a maximum thickness of about 12,500 feet, is divided about the middle by an unconformity; (2) that this unconformity is in the same stratigraphic plane and continuous …
Evidence Of Man In The Loess Of Nebraska, Erwin Hinckley Barbour
Evidence Of Man In The Loess Of Nebraska, Erwin Hinckley Barbour
Department of Earth and Atmospheric Sciences: Faculty Publications
After careful investigation the writer stands ready to announce his belief in the occurrence of human remains in the loess of this state, and for this primitive type he has proposed the name Nebraska Loess Man. Such importance attaches to the discovery as to warrant a paper devoted to the geological facts connected therewith.